M05 - Part 1_ Discussion - Network Architecturemo

CRC (Cyclic Redundancy Check) is done at this layer of the OSI model: Session Physical Application Data Link

(c) Figure 1 shows the routing in a wireless sensor network from source sensor node 0 to the destination sensor node 12. 12 8 7 11 10 3 5 4 2 Figure 1: A wireless sensor network Assume either DSR or DSDV routing protocol is used in this sensor network. The link between sensor nodes 3 and 11 suddenly is not functional due to a faulty device. Analyse how the routing protocol recovers from link breakage and finds a new route.

please solve this, thanks.

assume that T = a

Virtual circuit networks use the phrase "connection status information" to describe the state of a connection. A switch's forwarding database must be updated at what pace it creates and removes connections in a VC network at a rate of one connection per millisecond (on average).

On Ethernet networks, data is delivered to devices by their MAC addresses. For this to happen, switches and PCs dynamically build ARP caches and MAC address tables. With only a few computers on the network this process seems fairly easy. What might be some of the challenges on larger networks?

An Internet-service provider company uses a fiber-optic network to transmit data between locations. Data are carried through fiber-optic cables and switching nodes. A portion of the company's transmission network is shown here. The numbers above each arc show the capacity in gigabits of data per second that can be transmitted over that branch of the network. 3 4 3 4 2 4 1 2 6 5 5 3 2 7 To keep up with the volume of information transmitted between origin and destination points, use the network to determine the maximum amount of data, in gigabits per second, that may be sent from node 1 to node 7. X GB/s 1

The term "connection status information" is used in virtual circuit networks to characterise the state of a connection. The forwarding database of a switch must be updated at a rate of one connection per millisecond when it establishes and removes connections in a VC network (on average).

Explain how bridges operate at the data link layer of the OSI model.

Explain the role of switches and bridges at the Data Link layer of the OSI model.

Computer Science Two flows are transmitting at a constant rate of 4Mbps and 8Mbps and compete for service at a 10Mbps link. If the link adopts an RED policy, what is the expected drop probability for each flow?

14. In ethernet ring protection the protected link is selected by… A: lowest cost setting B: highest priority setting C: explicitly defining protection link D: lowest link speed 15. In STP the following parameters are used directly to determine whether the port will end up as forwarding or blocked: A: port number B: bridge MAC address C: cost setting D: port priority setting E: link speed F: A and B G: B and D H: B, C and D ○ I: A, C and D J: none of the above

I)“When the store-and-forward switching method is used in a switch, it makes a fast forwarding decision based on the source MAC address of a received frame.” Appraise this statement.

a) Based on Figure 2-1, answer the followings: yain Server Refeption Switch R Bridge ID: Priority- 28673 Mac Address - 00:23:59:A7:41:10 Fa0/11 Fa0/12 Swch R Fa0/12 Switch S Fa0/21 Switch S Bridge ID: Priority= 32769 Mac Address - 00:23:59:A7:41:18 Fa0/11, Fa0/22 Switch T Bridge ID: Priority= 32769 Mac Address 00:23:59:A7:41:1A Switch T Figure 2-1 A multi-switched network that implements STP The Spanning Tree Protocol (STP) is a network protocol that builds a loop-free logical topology for an Ethernet network. Based on Figure 2-1, illustrate and explain the 4-step STP convergence that would happen as below: (i) Root Bridge Election. (ii) Determine Root Port(s) on ALL non-root bridges. (iii) Determine Designated Port(s) (Only consider segments between non-root bridges). (iv) Determine Blocked Port.

TRUE OF FALSE Every network device implements the transport layer. [ ] In the Ring topology, each computer acts as repeater make error detection and boosts the signal before sending it on. [ ] In bus topology network media is inexpensive and easy to work with, so it is easier to trouble shoot than other topology. [ ] Error control only detects errors

A data link layer switch SW1 is connected with four hosts (H1, H2, H3, H4) as shown in figure below: Suppose switch table is empty and switch receives a frame with source MAC address of H1 (MAC-H1) and destination MAC address of H2 (MAC-H2). What actions will be performed by the switch in this case?

How does a switch operate at the data link layer of the OSI model?

Unlike datagram and virtual-circuit networks, circuit-switched networks do not need a routing or switching table to establish the output port from which destination-related data may be sent. Explain the cause of this disparity.

Explain which OSI model layer switches operate at, and provide an example of a device that operates at this layer.

course: Data communication and communication Networks Q: Compare the different TCP variants (Tahoe, Reno, New Reno, and SACK) forcongestion control and congestion avoidance mechanisms highlighting advantagesand disadvantages. You are also required to discuss the fairness of their congestioncontrol mechanisms using Raj Jain’s Fairness Index.

Explain how a Layer 2 switch operates at the data link layer in the OSI model.

Explain the role of a switch in the OSI model, and which layer(s) does it primarily operate at?

Explain the role of a router in the OSI model, specifying which layer it operates at and its primary function.

A data link layer switch SW1 is connected with four hosts (H1, H2, H3, H4) as shown in figure below: a) Suppose switch table is empty and switch receives a frame with source MAC address of H1 (MAC-H1) and destination MAC address of H2 (MAC-H2). What actions will be performed by the switch in this case? b) Consider switch MAC address learning capability, how many entries are expected in switch table c) Show all entries of switch table d) Consider the part "a" again, but with a fully populated switch table (all entries) instead of empty table e) H1 is unplugged from this LAN by the system administrator. Does this change affect the switch table? Explain your answer. Host 1 Link 1 Link 4 Data-link Host 4 Host 2 Layer Link 2 Link 3 Host 3